Roland Garros WTA: Maria Sakkari vs Claire Liu

Platform comparison

Active sub-markets

Market context

Maria Sakkari, the Greek world number 8, faces American qualifier Claire Liu in the opening round of Roland Garros 2026, scheduled for 28 May at 5:00 AM ET. Sakkari has reached the semi-finals of the French Open twice (2021, 2022) and holds a career record of 4–0 against Liu, winning their most recent encounter in straight sets at the 2024 Strasbourg tournament. Liu, ranked outside the top 100, qualified for the main draw and enters as a significant underdog despite her improving clay-court record over the past eighteen months.

The 100% implied probability reflects Sakkari's ranking advantage, head-to-head record, and seeding status rather than certainty of match completion. Roland Garros matches occasionally extend across multiple days due to weather or scheduling constraints; the settlement window extends to 4 June, providing a six-day buffer beyond the scheduled date. Early-round matches at the French Open rarely face cancellation, though rain delays are common during the tournament's opening week. Traders should monitor the official ATP/WTA draw confirmation and any weather forecasts issued within 48 hours of the match, as May weather in Paris can affect scheduling.

From a regulatory standpoint, this market's accessibility depends on jurisdiction. The German GlüStV framework treats prediction markets as gambling products requiring licensing; UK residents face no equivalent KYC threshold for markets under £1,500 notional value. US CFTC reach extends to binary sports outcomes offered to American citizens, though enforcement remains selective. The no-KYC threshold up to $1,500 USD on certain platforms means traders in non-regulated jurisdictions can participate without identity verification below that stake level, though settlement and withdrawal procedures vary by operator.

Methodology

This page reviews Roland Garros WTA: Maria Sakkari vs Claire Liu across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Polymarket Tax UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Tax UK, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on Polymarket Tax UK?

Zero. Polymarket Tax UK routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.